<template>
  <div :id="id" :class="className" :style="{ height: height, width: width }" />
</template>

<script>
import resize from "./mixins/resize";

export default {
  name: "KeyBar",
  mixins: [resize],
  props: {
    id: { type: String, default: "chart" },
    className: { type: String, default: "chart" },
    height: { type: String, default: "90%" },
    width: { type: String, default: "100%" },
    message: Object,
  },
  data() {
    return {
      chart: null,
      options: this.message
        ? this.message
        : {
            grid: {
              left: "30",
              right: "30",
              bottom: "18%",
            },
            legend: {
              data: ["packect", "bytes"],
            },
            toolbox: {
              y: "top",
              feature: {
                magicType: {
                  type: ["line", "bar", "stack", "tiled"],
                },
                saveAsImage: {
                  pixelRatio: 2,
                },
              },
            },
            tooltip: {},
            xAxis: {
              data: [
                "2021-1",
                "2021-2",
                "2021-3",
                "2021-4",
                "2021-5",
                "2021-6",
                "2021-7",
                "2021-8",
                "2021-9",
                "2021-10",
                "2021-11",
                "2021-12",
              ],
            },
            yAxis: {},
            dataZoom: [
              {
                show: true,
                start: 20,
                end: 100,
              },
              {
                type: "inside",
                start: 20,
                end: 100,
              },
            ],
            series: [
              {
                name: "packect",
                type: "bar",
                barWidth: "20%",
                data: [200, 20, 40, 180, 300, 50, 130, 100, 90, 220, 160, 30],
                emphasis: {
                  focus: "series",
                },
                itemStyle: {
                  borderRadius: 4,
                },
                animationDelay: function (idx) {
                  return idx * 10 + 100;
                },
              },
              {
                name: "bytes",
                type: "bar",
                barWidth: "20%",
                data: [20, 120, 140, 280, 30, 150, 230, 10, 190, 120, 60, 130],
                itemStyle: {
                  opacity: 0.8,
                  borderRadius: 4,
                  shadowBlur: 2,
                  shadowColor: "#111",
                },
                emphasis: {
                  focus: "series",
                },
              },
            ],
            animationEasing: "elasticOut",
            animationEasingUpdate: "elasticOut",
            animationDelay(idx) {
              return idx * 20;
            },
            animationDelayUpdate(idx) {
              return idx * 20;
            },
          },
    };
  },
  watch: {
    message: {
      handler(newValue) {
        this.options = newValue;
        this.chart.setOption(this.options, true);
      },
    },
    id() {
      this.initChart();
    },
    deep: true,
  },
  mounted() {
    this.$nextTick(() => {
      this.initChart();
    });
  },
  beforeDestroy() {
    if (!this.chart) {
      return;
    }
    this.chart.dispose();
    this.chart = null;
  },
  methods: {
    initChart() {
      let _this = this;
      this.chart = this.$echarts.init(document.getElementById(this.id));
      // 切换图列后触发
      this.chart.on("legendselectchanged", function (params) {
        _this.$emit("clickSessionChart", params);
      });
      // 点击图表
      this.chart.on("click", function (params) {
        _this.$emit("clickChartItem", params);
      });
      this.chart.setOption(this.options, true);
    },
  },
};
</script>
